The group number and period number respectively of an element with atomic number 8 are-

Correct option is C

The correct answer is (c) 16, 2.
The element with the atomic number 8 is Oxygen (O). To determine its group and period number:
1. Period Number: The period number is determined by the number of electron shells. Oxygen has 2 shells (K and L), so it belongs to Period 2.
2. Group Number: Oxygen has 6 valence electrons in its outermost shell (L-shell). It belongs to Group 16 (the Chalcogens) in the periodic table because elements in Group 16 typically have 6 valence electrons.
Information Booster:
· Atomic Number 8 corresponds to the element Oxygen.
· Group 16 elements are also known as the Chalcogens and include elements like Sulfur (S), Selenium (Se), and Tellurium (Te).
· Period 2 elements have two electron shells (K and L).
· Oxygen is a non-metal and a vital component for respiration and combustion processes.